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Scala’s Macros and C++ templates both provide access to compile time meta-programming. Could you elaborate on similarities and differences? Are they equal in terms of expressiveness?
One important difference between them is that Scala macros are written in Scala, whereas C++ templates are their own programming language, which is completely unlike C++. C++ is an imperative object-oriented strict impure language, C++ templates are a declarative hybrid logic/functional non-strict pure language, which was never intended to be used as a full-fledged programming language, and thus lacks many of the features necessary for programming in the large.